Can anyone supply me with the cam specs on a 350 mag? A co-worker is tinkering with his and would like to know what the stock grind is that Mercruiser uses.

What year motor?

Carb or MPI?

Roller or flat lifter?

Need to know this before we can answer.
If he can look up the Mercruiser cam part number would be helpful or give me the engine serial number I can do it for him.

Iggy, Thanks for responding. Will get info and respond soon. Ido know that it is a carb engine without roller lifters. Im guessing late 80's on year.

I'll bet it's the same as mine, 1988 and 270 hp.
If so the specs are:

Merc P/N 431-5943
GM P/N 340284
Flat lifter (non-roller)

Duration at .050 - 200 intake
212 exhaust

Lift at valve - .400 intake
.410 exhaust

Lobe centerline - intake 108 deg ATDC
exhaust 112 deg BTDC

Lobe seperation angle - 110 deg


Information obtained from:
Small-Block Chevy Marine Performance
By Dennis More

I strongly recommend getting this book.
Lots of good information.

Let me know what you find out about his enigne.